| Patent application number | Description | Published |
|---|
| 20080253552 | Acoustic Echo Canceller - An acoustic echo cancellation device ( | 10-16-2008 |
| 20080267378 | Conference System - A conference system ( | 10-30-2008 |
| 20080300869 | Audio Signal Dereverberation - A method of estimating the reverberations in an acoustic signal (y) comprises the steps of determining the frequency spectrum (Y) of the signal (y), providing a first parameter (α) indicative of the decay of the reverberations part (r) of the signal over time, and providing a second parameter (β) indicative of the amplitude of the direct part (d) of the signal relative to the reverberations part (r). An estimated frequency spectrum ({hacek over (R)}) of the reverberations signal (r) is produced using the frequency spectrum (Y) of a previous frame, the first parameter (α), and the second parameter (β). The second parameter (β). The second parameter (β) is preferably inversely proportional to the early-to-late ratio of the signal (y). | 12-04-2008 |
| 20100020984 | SIGNAL PROCESSING SYSTEM AND METHOD - A signal processing system comprises a microphone ( | 01-28-2010 |
| 20100189274 | DEVICE FOR AND A METHOD OF PROCESSING AUDIO SIGNALS - A method is provided which is suitable to cope with non-linear echo paths during acoustic echo cancellation in speakerphones. Non-linear paths occur particularly in hands-free operation of, e.g., a mobile phone, due to driving the amplifier and loudspeaker in the non-linear range. The idea is to combine the commonly known one microphone approach of linear acoustic echo cancellation using an adaptive filter and a post-processor together with a multiple microphone approach using beam forming which separately removes the non-linear part of the echo. | 07-29-2010 |
| 20110007073 | METHOD AND APPARATUS FOR MODIFYING A DIGITAL IMAGE - A digital image ( | 01-13-2011 |
| 20110103625 | AUDIO PROCESSING - An audio processing arrangement ( | 05-05-2011 |
| 20110206212 | Microphone System and Method of Operating the Same - A microphone system is provided, wherein the microphone system comprises a microphone array comprising a plurality of microphone units each adapted to generate a primary signal indicative of an acoustic wave received from the respective microphone unit, a first echo cancellation unit, an integrator unit, and a combination unit, wherein the microphone system is adapted to generate a first dipole response and a monopole response from the primary signals, wherein the integrator unit is adapted to generate a first integrated dipole response by integrating the first dipole response, wherein the first echo cancellation unit is adapted to generate a first echo cancelled integrated dipole response from the first integrated dipole response, and wherein the combination unit is adapted to combine the monopole response and the first echo cancelled integrated dipole response. | 08-25-2011 |
